[rules-dev] Drools and GWT Application integration
Mauricio Salatino
salaboy at gmail.com
Wed Sep 11 06:05:49 EDT 2013
If you are using maven you will need to add the dependency to your pom
file.. if not you will need to get the jar from somewhere.. like here for
example: http://slf4j.org
On Wed, Sep 11, 2013 at 11:01 AM, Moses Kalema <mkgremo20 at gmail.com> wrote:
> Where can i get?
>
>
> On Wed, Sep 11, 2013 at 12:53 PM, Mauricio Salatino <salaboy at gmail.com>wrote:
>
>> Ok, so the error is pretty clear: java.lang.NoClassDefFoundError:
>> org/slf4j/LoggerFactory
>>
>> You need to add that to your class path
>>
>>
>> On Wed, Sep 11, 2013 at 10:51 AM, Moses Kalema <mkgremo20 at gmail.com>wrote:
>>
>>> In my serviceImplementation[in the server package] class in GWT RPC
>>> When i try to check the execution the system doesn't run this line:
>>> KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
>>>
>>> KnowledgeBuilder kbuilder =
>>> KnowledgeBuilderFactory.newKnowledgeBuilder();
>>> //inputStream =
>>> this.getClass().getClassLoader().getResourceAsStream("ChangeSet.xml");
>>> url= this.getClass().getClassLoader().getResource("ChangeSet.xml");
>>> workingDirectory = System.getProperty("user.dir");
>>> System.out.println("URL "+url);
>>> file = new File(workingDirectory +"/src/ChangeSet.xml");
>>> if(file.exists()){
>>> System.out.println("Directory "+file.getName());
>>> }
>>> else{
>>> System.out.println("File not seen");
>>> }
>>> kbuilder.add(
>>> ResourceFactory.newUrlResource(url),ResourceType.CHANGE_SET);
>>> if( kbuilder.hasErrors() ) {
>>>
>>> System.out.println( kbuilder.getErrors() );
>>> System.out.println("The changeset file has errors");
>>> // return;
>>> }else{
>>> System.out.println("The changeset has no errors");
>>> }
>>>
>>> KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
>>> System.out.println("knowledgebase has been created");
>>>
>>> KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent(
>>> "MyAgent" );
>>> // URL url = getClass().getResource("ChangeSet.xml");
>>> // File file = new File(url.getPath());
>>> kagent.applyChangeSet( ResourceFactory.newUrlResource(url) );
>>> kbase = kagent.getKnowledgeBase();
>>> ResourceFactory.getResourceChangeNotifierService().start();
>>> ResourceFactory.getResourceChangeScannerService().start();
>>> System.out.println("knowledge agent created");
>>>
>>> StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
>>> System.out.println("session created");
>>> FactType factType = kbase.getFactType("procnet.requisition.test",
>>> "requisition");
>>> try {
>>> Object obj = factType.newInstance();
>>> factType.set(obj, "requisitionType", requisitionType);
>>> factType.set(obj, "totalCost", totalCost);
>>> FactHandle objHandle = ksession.insert(obj);
>>> ksession.fireAllRules();
>>> System.out.println(factType.get(obj, "approvalMessage"));
>>> approvalMessage = (String) factType.get(obj, "approvalMessage");
>>> //System.out.println(factType.get(obj, "name"));
>>> } catch (InstantiationException e) {
>>> e.printStackTrace();
>>> } catch (IllegalAccessException e) {
>>> e.printStackTrace();
>>> }
>>> return approvalMessage;
>>> This is the exact code i use in a normal java application and it works
>>> fine,infact even when i run the class as a java application it returns the
>>> approve message from guvnor.
>>> I find this strange
>>> This is the error am getting,
>>> 02:19:43.040 [WARN] Exception while dispatching incoming RPC
>>> call
>>>
>>> com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract com.planet.requisition.client.rules.RequisitionTemp com.planet.requisition.client.rules.RequisitionTempService.getRequisitionDet(java.lang.String,int)' threw an unexpected exception: java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
>>>
>>>
>>>
>>>
>>>
>>> at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385)
>>> at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588)
>>> at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
>>>
>>>
>>>
>>>
>>>
>>> at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
>>> at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
>>>
>>>
>>>
>>>
>>>
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>>> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
>>> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>>> at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>>> at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
>>> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>>> at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>>> at org.mortbay.jetty.Server.handle(Server.java:324)
>>> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
>>> at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
>>> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
>>> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
>>> at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
>>> Caused by: java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
>>> at org.drools.util.ServiceRegistryImpl.<clinit>(ServiceRegistryImpl.java:55)
>>>
>>>
>>>
>>>
>>>
>>> at org.drools.builder.KnowledgeBuilderFactory.loadServiceFactory(KnowledgeBuilderFactory.java:130)
>>> at org.drools.builder.KnowledgeBuilderFactory.getKnowledgeBuilderServiceFactory(KnowledgeBuilderFactory.java:124)
>>>
>>>
>>>
>>>
>>>
>>> at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:46)
>>> at com.requisition.RequisitionApproval.main(RequisitionApproval.java:35)
>>> at com.requisition.TestInputStream.main(TestInputStream.java:22)
>>>
>>>
>>>
>>>
>>>
>>> at com.planet.requisition.server.RequisitionTempServiceImpl.getRequisitionDet(RequisitionTempServiceImpl.java:37)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
>>>
>>>
>>>
>>>
>>>
>>> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
>>> at java.lang.reflect.Method.invoke(Unknown Source)
>>> at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569)
>>> at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
>>>
>>>
>>>
>>>
>>>
>>> at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
>>> at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
>>>
>>>
>>>
>>>
>>>
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>>> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
>>> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>>> at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>>> at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
>>> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>>> at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>>> at org.mortbay.jetty.Server.handle(Server.java:324)
>>> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
>>> at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
>>> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
>>> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
>>> at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
>>> Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
>>> at java.net.URLClassLoader$1.run(Unknown Source)
>>> at java.security.AccessController.doPrivileged(Native Method)
>>>
>>>
>>>
>>>
>>>
>>> at java.net.URLClassLoader.findClass(Unknown Source)
>>> at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload$WebAppClassLoaderExtension.findClass(JettyLauncher.java:372)
>>> at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:366)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:337)
>>> at org.drools.util.ServiceRegistryImpl.<clinit>(ServiceRegistryImpl.java:55)
>>> at org.drools.builder.KnowledgeBuilderFactory.loadServiceFactory(KnowledgeBuilderFactory.java:130)
>>>
>>>
>>>
>>>
>>>
>>> at org.drools.builder.KnowledgeBuilderFactory.getKnowledgeBuilderServiceFactory(KnowledgeBuilderFactory.java:124)
>>> at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:46)
>>>
>>>
>>>
>>>
>>>
>>> at com.requisition.RequisitionApproval.main(RequisitionApproval.java:35)
>>> at com.requisition.TestInputStream.main(TestInputStream.java:22)
>>> at com.planet.requisition.server.RequisitionTempServiceImpl.getRequisitionDet(RequisitionTempServiceImpl.java:37)
>>>
>>>
>>>
>>>
>>>
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
>>> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
>>> at java.lang.reflect.Method.invoke(Unknown Source)
>>>
>>>
>>>
>>>
>>>
>>> at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569)
>>> at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
>>> at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
>>>
>>>
>>>
>>>
>>>
>>> at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
>>> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
>>> at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>>> at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
>>> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>>> at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
>>> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.Server.handle(Server.java:324)
>>> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
>>> at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
>>> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
>>> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
>>> at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
>>>
>>>
>>>
>>>
>>>
>>> at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
>>>
>>>
>>>
>>> On Wed, Sep 11, 2013 at 11:11 AM, Mauricio Salatino <salaboy at gmail.com>wrote:
>>>
>>>> Hi, we are using GWT and Drools in all our tooling.. For example if you
>>>> take a look at the kie-wb workbench or the jbpm-console-ng they are create
>>>> Knowledge Session (kie sessions) right now.
>>>>
>>>>
>>>> On Wed, Sep 11, 2013 at 9:07 AM, Moses Kalema <mkgremo20 at gmail.com>wrote:
>>>>
>>>>> Hello everyone,
>>>>> I recently started using Drools Guvnor and i find it necessary. I
>>>>> create rules on Guvnor and fire the rules in a Java application and
>>>>> everything is fine.
>>>>> However when i try to access the rules in a GWT application,i get an
>>>>> error which looks like none of the Drools code is executed.
>>>>> My request is if any one has used rules n a GWT application please
>>>>> help me out
>>>>>
>>>>> --
>>>>> Moses Kalema
>>>>> Bachelor Science in Computer Engineering
>>>>> Software/Mobile/Embedded Systems Developer
>>>>> +256773391723
>>>>> +256704209937
>>>>> Skype: mkgremo
>>>>> Twitter: @mkgremo
>>>>> "Life's Success is based on Opportunity not Chance"
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> rules-dev mailing list
>>>>> rules-dev at lists.jboss.org
>>>>> https://lists.jboss.org/mailman/listinfo/rules-dev
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> - MyJourney @ http://salaboy.com <http://salaboy.wordpress.com>
>>>> - Co-Founder @ http://www.jugargentina.org
>>>> - Co-Founder @ http://www.jbug.com.ar
>>>>
>>>> - Salatino "Salaboy" Mauricio -
>>>>
>>>> _______________________________________________
>>>> rules-dev mailing list
>>>> rules-dev at lists.jboss.org
>>>> https://lists.jboss.org/mailman/listinfo/rules-dev
>>>>
>>>
>>>
>>>
>>> --
>>> Moses Kalema
>>> Bachelor Science in Computer Engineering
>>> Software/Mobile/Embedded Systems Developer
>>> +256773391723
>>> +256704209937
>>> Skype: mkgremo
>>> Twitter: @mkgremo
>>> "Life's Success is based on Opportunity not Chance"
>>>
>>>
>>> _______________________________________________
>>> rules-dev mailing list
>>> rules-dev at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-dev
>>>
>>
>>
>>
>> --
>> - MyJourney @ http://salaboy.com <http://salaboy.wordpress.com>
>> - Co-Founder @ http://www.jugargentina.org
>> - Co-Founder @ http://www.jbug.com.ar
>>
>> - Salatino "Salaboy" Mauricio -
>>
>> _______________________________________________
>> rules-dev mailing list
>> rules-dev at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-dev
>>
>
>
>
> --
> Moses Kalema
> Bachelor Science in Computer Engineering
> Software/Mobile/Embedded Systems Developer
> +256773391723
> +256704209937
> Skype: mkgremo
> Twitter: @mkgremo
> "Life's Success is based on Opportunity not Chance"
>
>
> _______________________________________________
> rules-dev mailing list
> rules-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-dev
>
--
- MyJourney @ http://salaboy.com <http://salaboy.wordpress.com>
- Co-Founder @ http://www.jugargentina.org
- Co-Founder @ http://www.jbug.com.ar
- Salatino "Salaboy" Mauricio -
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